Transcript Laser Update

Injector Drive Laser Update
Facilities Advisory Committee Meeting
April 7, 2005
Project Status
Drive Laser Procurement
R&D
Launch System Design
April 7 2005
Facilities Advisory Committee
Injector Drive Laser Update
Sasha Gilevich
[email protected]
Project Status
Design of the S20 drive laser facility is underway. Bids are
due from general contractors on April 14th
The vendor for the Drive Laser is selected. Purchasing is
working on the award of the contract.
Basic design of the transport tubes done; drawings
submitted for the quote. Shielding should be approved by
radiation physics.
Design of the Launch and Conditioning System is near
completion
R&D effort is defined and started. BCR is approved
LCLS performs shaping & UV conversion R&D with other labs
(LLNL, ANL)
BNL temporal shaping work with Dazzler completed
April 7 2005
Facilities Advisory Committee
Injector Drive Laser Update
Sasha Gilevich
[email protected]
Drive Laser Procurement Process
Write Request for
Information
(RFI)
Drive Laser
Technical
Review
July 21, 2004
Evaluate RFI & Technical
Review Responses
Write Request for Proposal
(RFP)
Write & Approve
Advance Procurement Plan
(APP)
SLAC Awards
Contract
Evaluation
Committee
Selects
Vendor
Site
Visit
April 7 2005
Facilities Advisory Committee
Injector Drive Laser Update
Submit RFP to
Vendors
Evaluation
Committee
Ranks the
Proposals
Evaluation &
Technical
Committees
Review the
Proposals
Sasha Gilevich
[email protected]
Drive Laser Procurement
Responding to the RFP
5 Companies submitted the proposals
Toptica Photonics
April 7 2005
Facilities Advisory Committee
Injector Drive Laser Update
Sasha Gilevich
[email protected]
Drive Laser Proposals
Only Thales signed to meet all the specs
Thales sold high energy IR system with the Dazzler
KM Labs and Femtolasers manufacture oscillators
Thales and Coherent manufacture DPSS pump lasers
KM labs proposed 1KHz system
Cryo cooling of the final amplifier (Coherent, KM labs, Amplitude)
Nobody has experience with UV temporal shaping and can
guarantee meeting UV temporal shaping specs
Amplitude and KM Labs proposed R&D plan for UV temporal
shaping
Temporal shaping. KM Labs proposed passive optical filtering
with LCD modulator, the others - Dazzler
Only Amplitude suggested diagnostics development
Thales and Coherent controls require minimum SLAC integration
work
April 7 2005
Facilities Advisory Committee
Injector Drive Laser Update
Sasha Gilevich
[email protected]
Drive Laser Vendor Selection
Thales
Strengths
High potential output IR energy (80mJ system at ALLS)
Manufacturer of the QCW DPSS pump laser (Jedi)
Used Dazzler in several systems (but not for shaping) (ALLS).
Proposed configuration can be upgraded to higher energy (up to
50mJ) by adding second Jedi pump.
Cryo cooling is not needed, but can be added
Aberration-free stretcher (patented). Motorized
Provides programmable, multi-channel pulse synchronization unit.
Short delivery time (8 months)
Thales is a part of a very large French defense contractor
Controls system is compatible with LCLS requirements
April 7 2005
Facilities Advisory Committee
Injector Drive Laser Update
Sasha Gilevich
[email protected]
Drive Laser Vendor Selection
Thales
Weaknesses
UV shaping part is not developed
Possible reliability issues with QCW pump lasers (relatively
new product)
Warranty on the diodes is for 1-year or 1-billion pulses.
Warranty on optics is 3 months
No details on special diagnostics – (SLAC streak camera)
Non-US company
Distant location
April 7 2005
Facilities Advisory Committee
Injector Drive Laser Update
Sasha Gilevich
[email protected]
Open Issues
Choice of oscillator. (Femtolasers
Femtosource Synergy or the oscillator from
KM labs)
Controls interface
Option to use cryo cooling
April 7 2005
Facilities Advisory Committee
Injector Drive Laser Update
Sasha Gilevich
[email protected]
Risk Mitigation
Buy additional pump laser
Conduct UV shaping R&D (LLNL)
Develop special diagnostics (LLNL)
April 7 2005
Facilities Advisory Committee
Injector Drive Laser Update
Sasha Gilevich
[email protected]
Laser Beam Shaping Work at LLNL
(March – December 2005)
Continue the Dazzler shaping studies to improve the quality and
reliability of the UV pulse and to explore other shape types
Design a third-harmonic, non-linear optical system with more than
10% IR to UV conversion efficiency which uniformly converts over a
10 nm bandwidth.
Modeling
Integrated model including temporal shaping and UV conversion.
Optimize UV conversion efficiency
Investigate designs which integrate shaping and conversion. In
particular, the approach converting to UV with a short pulse and then
stretching in the UV to the desired length
Experiments
IR and blue shaping
Test and optimization of the UV conversion. UV shaping
April 7 2005
Facilities Advisory Committee
Injector Drive Laser Update
Sasha Gilevich
[email protected]
Laser Diagnostics Effort at LLNL
(March – September 2005)
Design, build and test diagnostic systems capable of
measuring the IR, blue and UV wavelength-phase
correlation (waveform) of the laser beam with better than
100 fs and 0.1 nm resolution. These diagnostics need to
make these measurements for pulses as long as 20 ps
and should be single-shot.
April 7 2005
Facilities Advisory Committee
Injector Drive Laser Update
Sasha Gilevich
[email protected]
LLNL Work - Summary
Perform R&D on techniques to produce temporally shaped UV pulses
suitable for use in the LCLS injector.
Design, build and test laser diagnostics.
Test cathode launch optics with shaped pulses.
Provide (advise on) the beam steering stabilization system, which
was developed by LLNL.
Support in the Drive Laser integration.
Participate in the technical reviews of vendor’s work.
Support integration of shaping into the drive laser
April 7 2005
Facilities Advisory Committee
Injector Drive Laser Update
Sasha Gilevich
[email protected]
ANL Work
UV Conversion and Spatial Shaping
Obtain reference data for conversion efficiency of second and third
harmonic of IR laser light from a broadband TiS laser source
Compare these results to modeling predictions from the SNLO code
Assess the effects of shaping the incident IR transverse profile on the
conversion efficiency and transverse profile of the third harmonic (UV)
Assess relay imaging of third harmonic light with a transversely
shaped (non-Gaussian) profile over an extended transport distance
and compare to modeling predictions from the ZEMAX code
Evaluate the performance of a reflective UV diffraction grating with
respect to diffraction efficiency, anamorphic profile shaping and tilted
amplitude front generation (time slew) and the UV fluence threshold
for surface damage
April 7 2005
Facilities Advisory Committee
Injector Drive Laser Update
Sasha Gilevich
[email protected]
Launch and Conditioning System
Requirements
Grazing incidence at the photocathode (22.5
degrees). Requires time slew compensation
Uniform spatial shape.
Continuous adjustment of the beam
diameter on the photocathode
from 0.38 to 2 mm (remotely)
Option to steer the beam on the cathode
(remotely)
April 7 2005
Facilities Advisory Committee
Injector Drive Laser Update
Sasha Gilevich
[email protected]
Launch System Layout
Aspheric Refractive Beam Reshaper
Diffraction grating for time slew correction
Aperture for producing the hard edge
Two lenses imaging the aperture to the cathode
Adjustable distance between lenses for beam diameter
control
Insertable telescope to change the diameter adjustment
range (needed because of limited table space)
2 mirrors with variable angle on translation stages for beam
steering
Beam splitter for diagnostics (virtual cathode concept)
April 7 2005
Facilities Advisory Committee
Injector Drive Laser Update
Sasha Gilevich
[email protected]
Layout
April 7 2005
Facilities Advisory Committee
Injector Drive Laser Update
Sasha Gilevich
[email protected]
Beam Profile
(ZEMAX modeling. Bandwidth 3nm)
Minimum spacing between lenses
Y
X
Side – 10mm
April 7 2005
Facilities Advisory Committee
Injector Drive Laser Update
Sasha Gilevich
[email protected]
Beam Profile
(ZEMAX modeling. Bandwidth 3nm)
Maximum spacing between lenses
Y
X
Side – 5mm
April 7 2005
Facilities Advisory Committee
Injector Drive Laser Update
Sasha Gilevich
[email protected]
Beam Profile with the 3:1 Telescope
Minimum spacing between lenses
Y
Y
X
X
Side – 5mm
April 7 2005
Facilities Advisory Committee
Injector Drive Laser Update
Sasha Gilevich
[email protected]
Beam Profile with the 3:1 Telescope
Maximum spacing between lenses
YY
X
X
Side – 2mm
April 7 2005
Facilities Advisory Committee
Injector Drive Laser Update
Sasha Gilevich
[email protected]
Summary
Drive Laser vendor is selected
R&D work is needed to solve shaping and UV
conversion issues
Schedule and budget for LLNL and ANL effort put
together
BCR is approved
Work started
Launch System Optical design is completed
Design allows to meet the required specifications
April 7 2005
Facilities Advisory Committee
Injector Drive Laser Update
Sasha Gilevich
[email protected]